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Bard part number 8301-076-001B is the UPC3 control board used in Bard LC6000 Series PLC lead/lag controller assemblies for telecom and equipment shelter applications, providing the core logic and relay outputs that coordinate staging, alarms, and unit rotation when managing multiple Bard wall-mount systems. This is an OEM Bard electrical/control component intended to restore proper controller operation when a failed or outdated board causes communication, sequencing, or fault issues. Because this part carries a software revision identifier, confirm your site requirements and follow Bard guidance on matching or updating software across connected PLC controller units and supervisory controllers during replacement to maintain system compatibility and stable operation.